title: Analysis of 1.9 Mb of contiguous sequence from chromosome 4 of Arabidopsis thaliana.
abstract: The plant Arabidopsis thaliana (Arabidopsis) has become an important model species for the study of many aspects of plant biology. The relatively small size of the nuclear genome and the availability of extensive physical maps of the five chromosomes provide a feasible basis for initiating sequencing of the five chromosomes. The YAC (yeast artificial chromosome)-based physical map of chromosome 4 was used to construct a sequence-ready map of cosmid and BAC (bacterial artificial chromosome) clones covering a 1.9-megabase (Mb) contiguous region, and the sequence of this region is reported here. Analysis of the sequence revealed an average gene density of one gene every 4.8 kilobases (kb), and 54% of the predicted genes had significant similarity to known genes. Other interesting features were found, such as the sequence of a disease-resistance gene locus, the distribution of retroelements, the frequent occurrence of clustered gene families, and the sequence of several classes of genes not previously encountered in plants.
authors.affiliation: Department of Molecular Genetics, John Innes Centre, Colney, Norwich, UK. bevan@bbsrc.ac.uk
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mesh_terms: D017360:Arabidopsis / Q000235:genetics*; D002874:Chromosome Mapping; D018244:Chromosomes, Artificial, Yeast; D017343:Genes, Plant / Q000502:physiology; D018745:Genome, Plant; D005810:Multigene Family; D010940:Plant Proteins / Q000235:genetics; D017422:Sequence Analysis, DNA
chemical_list: D010940:Plant Proteins